I have the 14k Hamilton, seem okay to me but they are my first set of halides.
Crisp white light, growth on clam and SPSs and xenia going nuts. As for colour my acros are a little pale but thats a result as the red acro bug attack. Have a orange monti plate that retained it's rich colour from where it was fragged but some of the green monti plate has browned out compared to the tank it originated from (was warned as would likely happen).
Feeling little bad about forwarding RC links but
here's one on the Hamiltons